1088370 - Investigate what needs to be done to make the CDN answer API responses faster

Status: RESOLVED WONTFIX

(Marketplace Graveyard :: API, defect, P3)

Description

[Mathieu Pillard [:mat]]

Per bug 1085739 we know our CDN is not answering the homepage API requests very fast. It can take up to 600ms !

We need to find why. 

- The size of the endpoint itself is pretty small, and served gzipped (both from the CDN and from zamboni). There is room for improvement (bug 1088369) but that shouldn't be the main issue.

- When bug 1088362 is fixed the CDN should be able to cache the homepage API endpoint for a longer time, thus improving the cache hit ratio and hopefully make things faster.

- Even though we don't have OCSP stapling on our own servers (bug 1011152), our CDN *does*, so that's not the culprit:
% openssl s_client -connect marketplace.cdn.mozilla.net:443 -tls1  -tlsextdebug  -status | fgrep OCSP
OCSP response: 
OCSP Response Data:
    OCSP Response Status: successful (0x0)
    Response Type: Basic OCSP Response

*However* SSL negociation seems to take 200ms in average according to WebPageTest, which is a lot.

More ideas ?